API&ISO drilling bits for oil and gas/supply high quality PDC drill bit2015-11-18 08:54:01 |
Kingdream API 12 1/4" IADC 417 TCI Tricone bit/rock Drilling Bit2015-11-18 09:02:19 |
13 3/4 tungsten carbide tricone bit2015-11-18 09:03:02 |
new tricone roller rock bits for oil field2015-11-18 09:03:03 |